3 days ago · We dive into that in this blog by comparing the 300 blackout vs 556 NATO. 300 Blackout vs. 9mm Parabellum After 5.56 NATO, 9mm is one of the most popular calibers that are commonly used and actively sought after (especially during the pandemic). Take your favorite fandoms with you and never miss a beat. Escape from Tarkov Wiki is a FANDOM Games Community. The .300 Blackout (7.62x35) is a rifle cartridge used for assault rifles in Escape from Tarkov. T Denotes Round is a Tracer FM Denotes Round cannot be listed for sale on the flea market Assault rifles MCX.The new CMMG Dissent is available in three calibers: 5.56 NATO, 5.7 NATO, and .300 Blackout. Both .300 BLK and 5.56 will accept and ship with their respective 30-round Magpul PMAGs, and the 5.7 ...Learn how the 5.56 NATO/.223 Rem. and the .300 BLK cartridges evolved from different origins and applications. See how they differ in ballistics, accuracy, and …Well, you’ve done it. You’ve gone and eaten yourself into a food coma. Your belly feels stretched beyond capacity and you can barely move your limbs. The ideal solution is no doubt...Aug 18, 2020 · 300 blackout, but there are two major caveats: 1. You have to have a quality barrel. Based on all the thousands of first hand reports, most factory 300 blk barrels are a 3-4 moa blunderbuss. So people think it's an inherently inaccurate round. If you can't get good shot placement, animals will run off after being shot. @padom can weigh in on ... Cartridge Wars. Every gun, rifle, handgun or hunting publication nearly every year runs the same litany of articles comparing the .270 Winchester to the 30-06 Springfield, the 9mm vs the .40 Smith and Wesson or the .45 …Jun 14, 2022 · Demolition Ranch Tees here! Comes with a free hug if I catch you wearing it. https://www.bunkerbranding.com/pages/demolition-ranchWatch me vlog. http://www.y... Nov 7, 2023 · Learn the differences and similarities between the 300 Blackout and the 5.56 NATO, two popular cartridges for AR-15 rifles. See how they perform in recreational shooting, hunting, and home defense scenarios. Not that it really matters, but 300 blackout and 308/7.62x51 use the same caliber bullet. Both are 308. The 300 blackout would typically be loaded with a lighter grain bullet, but they could be interchanged if you had the right load data. ... 5.556 IRL does more body mass damage. Its a smaller caliber buts is velocity is insane. Getting hit ...Jul 22, 2018 ... We test out these two AR style calibers! Both the 5.56 and the 300 AAC are very cool rounds. Had a lot of fun making this video.May 7, 2020 ... CMMG here: https://bit.ly/3cHkvMp Pinty reflex site: https://amzn.to/2PY3Wlx Truly appreciate you watching the videos!!! WTW shirts!Jul 19, 2022 · .300 Blackout vs. 5.56 NATO Strengths & Weaknesses. Both .300 BLK and 5.56 NATO are intermediate-class rifle cartridges for target shooting, hunting, home defense, and plinking. The 5.56 is half the cost of 300 BLK and is available in more high-end loading suitable for precision rifle fire. Jan 12, 2024 · In this article, we are briefly comparing the 300 blackout vs 5.56 NATO to help AR15 builders making a sound decision when picking a caliber platform. When it comes to comparing 300 Blackout and 5.56 NATO, there are several distinguishing factors including: Bullet weight performance. Ballistics performance based on barrel lengths and twist rate. Although the 300 Blackout bows to the 458 SOCOM in terms of muzzle energy, the 300 BLK’s flat trajectory makes it a much better long range cartridge than the 458. At 300 yards, the 125 gr 300 BLK round has -29.7” of bullet drop compared to …Nov 15, 2023 · The 300BLK round offers the same energy as 5.56mm but with a shorter barrel (while staying quieter). In addition, 300BLK rifle upper assemblies can be paired with any AR-15 lower assembly and in most cases is compatible with 5.56mm magazines. The upgrade process is easy and can be done without the need for an armorer. One popular choice is using a .30 caliber silencer to shoot rounds such as .308/7.62 NATO, and 300 AAC BLK, but also using it to shoot smaller .223 and 5.56 NATO rounds. Even though a .30 Cal silencer will suppress a gun shot from a smaller caliber, the sound isn’t as suppressed as it would if the shooter were using a model made exclusively ...The .300 blk and .308 Win are fairly similar in pricing and can be found in a range of $1.25 to $2.50 per round. The .308 Win is a more popular round so you can have better deals. Additionally, the .308 Win has a ton of bullet options available for it, along with a lot of other information and data.An H3 buffer similarly should be between 5.4 and 5.5 ounces depending on the manufacturer. Finally, a Rifle buffer should weigh 5.1 to 5.3 ounces and is noticeably longer than the carbine varieties. ... H2 with a Sprinco blue spring functions beautifully in my 300 Blackout with a Faxon 9″ gunner barrel with pistol gas, a Sons of Liberty ...An H3 buffer similarly should be between 5.4 and 5.5 ounces depending on the manufacturer. Finally, a Rifle buffer should weigh 5.1 to 5.3 ounces and is noticeably longer than the carbine varieties. ... H2 with a Sprinco blue spring functions beautifully in my 300 Blackout with a Faxon 9″ gunner barrel with pistol gas, a Sons of Liberty ...Learn the history, ballistics, and performance of two popular AR-15 calibers: 300 Blackout and 5.56 NATO. See how they differ in velocity, drop, energy, and terminal …5.56 ammo will be more available in general let alone an end of world scenario and have a little further range. Although the 300 will be more fun to shoot suppressed with subs. I’d go with 5.56 first you can always buy another 300 upper later to swap back and forth for fun. 3.Sep 18, 2023 · 5.56 (left) vs 300 Blackout (right) Stood side by side, it is easy to see just how different the 223/5.56 and the 300 Blackout are in terms of appearance. Perhaps the biggest difference between the 223/5.56 and the 300 Blackout is the bullets they are using. The 5.56/223 uses 22 caliber projectiles, or 0.224” diameter, which generally range ... go 300 blackout. Otherwise, go 556. As such, it's fair to say that 300 blackout serves a niche. That being, it performs well in a short barrel, and it can go subsonic, making it a great choice for a supressed, short barrel home defense weapon. It also performs fine with supersonics at range, giving it an edge over AR9s. Using 500 meters as a benchmark, a NATO standard 5.56x45mm M855 projectile fired at 2,900 FPS will have 100 inches of drop, 41 inches of drift, and 291 ft.-lbs. of energy at that distance. In contrast, a .300 Blackout 125 grain projectile at 2,220 FPS has: 100 inches drop at 440 meters. 41 inches drift at 484 meters. Both the .308 and the .300 PRC can shoot the exact same bullet (projectile). For example, a 180-grain GMX bullet could be loaded and fired out of either cartridge. Bullet designs are mostly interchangeable between cartridges of the same caliber. However, the .308 Winchester case is much smaller than the case of a .300 PRC.Here's why: It's faster. At about 3,000 f/s, this round screams out of the barrel. It's lighter to carry. Whereas the 300 is a heavy .30 caliber round, the 5.56 is a .22 caliber (no it's not the same .22 caliber rim fire long rifle round in your 12-year-old plinker). So you can carry more of them. It's got a longer range of effectiveness.Jan 22, 2023 · Mid Range (300-600m) Shooting. . The short version is, the 5.56 is more accurate and better at extended range, while the .300 BLK has more of an impact on organic targets at close range, and works better with a suppressor. The big thing to keep in mind is that there’s no one round to rule them all here. The debate between .300 Blackout and 5.56mm NATO has been going on since the former emerged in 2010. But it's just a matter of preference The debate between .300 Blackout and 5.56mm NATO has been ....300 Blackout vs. .223/5.56 NATO. Comparing .300 blackout to .223 Remington/5.56 NATO is quite common, and for good reason. Both cartridges are ideally suited for the AR platform and use a lot of the same parts. FMJ 5.56 is velocity-dependent and excels out of longer barrels. A 55-grain 5.56 round leaves a 16-inch barrel at a blistering 3,000 ...Jul 3, 2023 · The .300 BLK, on the other hand, is a larger diameter round that is often slower but hits with more ft-lbs on target. The 300 blackout is also a much better round when it comes to suppressing. Let’s talk about super and subsonic ammo. 300 blackout vs 556 Power and Range. Both 5.56 and 300 blackout have been extensively tested. What testing ... The .300 blk and .308 Win are fairly similar in pricing and can be found in a range of $1.25 to $2.50 per round. The .308 Win is a more popular round so you can have better deals. Additionally, the .308 Win has a ton of bullet options available for it, along with a lot of other information and data.Jan 26, 2022 · At 200 yards, the 5.56 was stronger in two comparisons but weaker in one. Clearly you can’t say that one is more powerful than the other. This is an interesting result, as each one has a potential advantage for power; the 5.56 is faster, but the .300 Blackout has a heavier projectile. In the end, this results in a draw. Nov 10, 2018 · For hunting, both the .300 BLK and .223/5.56 are limited to about 100 yards on most deer-sized game using the proper bullets. Despite what you hear today from the 6.5mm crowd, small bullets are still small bullets and a 5.56mm isn’t really ethical past 100 yards on a deer, but is fine on smaller game at longer distances. The most obvious difference between the 300 Blackout vs 223 Rem is the bullet diameter that each rifle cartridge fires. The 223 Remington fires a 0.224” diameter bullet while the 300 BLK uses a 0.308” diameter bullet. Both cartridges have the same overall length so they can fit in standard AR-15 mags.This is because the Russians measure bore diameter differently from Americans (more details on that here ). Though they are similar in overall size, the .300 Blackout has a slightly longer overall length (2.26″ vs 2.2″), but the 7.62x39mm has a slightly longer case length (1.528″ vs 1.368″).Overall, the X95 turned in similar groups in 300 Blackout as it shot in .223 and 5.56. It has proven itself to be a 2 to 4 MOA kind of a gun. I’m satisfied that the X95 shot this well in 300 BLK — especially with its 1:8 rifled barrel. Most folks would consider a bit of a slow twist rate to stabilize those heavy, slow projectiles.Truly appreciate you watching the videos!Armor here: https://acelinkarmor.com/CMMG here: https://bit.ly/3cHkvMpNew Merch available - https://bit.ly/2W68GqpH...The 308 Winchester is a full powered rifle round that was designed in 1952. It case length of 51mm and uses a 30 caliber projectile. Light loaded rounds like a 125 spitzer round cna reach speeds of 3,100 feet per second. The 300 Blackout is derived from the 300 Whisper and received a SAAMI spec in 2011.Demolition Ranch Tees here! Comes with a free hug if I catch you wearing it. https://www.bunkerbranding.com/pages/demolition-ranchWatch …Oct 4, 2012 ... Wanted to do some penetration tests with some of the different calibers for the AR15 Platform. 5.45x39 5.56 300 Blackout and 7.62x39.Aug 22, 2020 ... Recoil will be drastically less than an AR pistol or SBR in 5.56mm or .300 BLK. Ammunition will be cheaper. That means it's cheaper to shoot and ...300 BLACKOUT vs 556. by Jeff Hall. Colt with .300 upper, Leupold scope, and Gemtech One suppressor. Articles have been written on the . 300 AAC Blackout (.300 BLK) that give the history and purpose of the cartridge. I decided to put one together to see how it performed suppressed. I had some parts and a stripped BCM upper and got a barrel from ...We can’t have a 6.5 Grendel vs 300 Blackout comparison without discussing the magazine situation for each cartridge. First, since it’s more closely related to the 223 Remington cartridge and has a similar enough overall shape, the 300 Blackout can use regular AR-15/M-16 rifle/M-4 carbine magazines designed for use with the 223/5.56 ...In this video, former Marine Raider Mike Abarca shoots reams of paper with 147 gr. 300 blackout. A few weeks ago, we shot reams of paper with a 16-inch AR-15...CMMG Banshee Mk4 Background. The CMMG Banshee is a nine-millimeter AR-style pistol, it features a five-inch Chromoly barrel with a 1-10 twist. A pistol brace is mounted at the back on the buffer tube and using both 6061 and 7075 alloys for the upper and lower receiver help keep the weight of this little pistol down to four-point-seven pounds.Based on ASPCA data from 2021, the total annual cost of caring for a dog or cat for the first year was closer to $2,705 and $1,556, respectively. After that, routine yearly expense...The .300 Blackout bullet diameter is .308 inches, which is larger than the 6.5 Grendel's bullet diameter of .264 inches. The neck diameter of the .300 Blackout cartridge is .338 inches. Recommended powder charges for the .300 Blackout depend on the specific bullet weight and type being used, but generally range from 9 to 17 grains for subsonic ...At A Glance: Our Top 5 Picks For .300 Blackout Rifles in 2024. Editor's Choice: Ruger AR-556 .300 Blackout. Most Comfortable: Wilson Combat AR-15 Ranger. Best Quality: Savage Arms 110 Carbon Predator. Best for Hunters: Ruger American Ranch Rifle. Most Affordable: Palmetto State Armory PSA 15 in 300 blackout.For example, costs of 300 Blackout rounds range from $.60 per round to $2.00 per round. That gives it an average of $1.30 per round. In comparison, the .308 ammo costs range from $.35 per round to $1.50 per round with an average of $.90 per round. That makes the 300 Blackout about 45% more per round on average.The Diamondback DB15 CCMLU300BFB 5.56 & 300 blackout Combo is made entirely in the USA! Starting with the tried-and-true, U.S. Military-proven gas-impingement system and using only the highest quality components machined in Diamondback’s CNC facility. The DB15 raises the bar when it comes to features and performance when compared to others.But to 200 yards, the difference is less than two inches. That higher velocity also means that the 6.8 cartridge has a higher muzzle energy than the 300 BLK, clocking in at about 1,694 foot pounds for the 115gr variant to 300 BLK’s 1,360 for their 125gr offering. And the 6.8 SPC’s performance only improves with added weight.This is largely because .300 BLK achieves full powder burn out of a 9-inch barrel, while 5.56 requires a 20-inch barrel to reach its ballistic peak. In fact, a 110-grain .300 BLK bullet fired out of a 10.5-inch barrel has slightly more muzzle energy than a 55-grain 5.56 bullet fired out of a 16-inch barrel! If that wasn’t enough to illustrate ...In today’s world, where power outages can occur unexpectedly, having a reliable backup power source is essential. A home generator provides peace of mind and ensures that your hous....300 BLK and .223 Rem use the same case (more or less), so the real difference is the bullet weight. And the bullet weighs between 123gr and 220 gr for .300 BLK, and only about 55-62 for .223. So it’s about 3 times as heavy as .223. 7.62×39 weighs about the same as .300 BLK, so yeah. 2.23 times heavier to be specific.The primary difference between 223 and 300 Blackout is the bullet diameter each rifle cartridge fires. The 223 Rem fires a 0.224” diameter bullet while the 300 ...Truly appreciate you watching the videos!!!WTW shirts!!! - https://bit.ly/2W68GqpHeavy Metal here: https://bit.ly/30wF6wWSupport us on Patreon https://www.pa...5.56. -The 5.56 is half the cost of 300 BLK and is available in more high-end loading suitable for precision rifle fire. -The 5.56 also shoots flatter, has less recoil, and the ammunition weighs about 40% less. -The 5.56 is also safer for use inside a building for home-defense because the rounds are designed to break apart upon impact. .300 Blk. Looking for a product featured in this video? YouTube prevents us from posting links. Head over to our website to find what you're looking for.Check out our ...The 300 Blackout has been optimized for maximum efficiency in a 9-inch barrel, making it very suitable for secret work in compact AR-15 SBRs. View Details at Brownells The official parent case is the Fireball .221, but you also can consider this case as a .223 one, which has been modified to accept .308 diameter projectiles.LC brass necks are about .330" dia. with a seated bullet. Too easy to make .300 Blk cases and since you have a good supply of LC brass I'd make some. 300 Blackout is fun to load and shoot and the majority of Blackout shooters form their own brass. Cut to length 1st, deburr, size in blackout sizing die, trim, load with published data.This is one of the newest and most revolutionary weapon and ammo configuration adopted by the US military. 300 blackout and the MCX weapon is a specialized t...5.56 NATO Short barrel life due to high velocity and pressure Compromises on stopping power at an increasing range Prohibited in many states for hunting CXP2 or bigger game Best For 300 Blackout The .300 …The AR-556® rifle with free-float handguard is now available chambered in .300 Blackout. This addition to the Ruger® AR-556 rifle line features a 16.10" cold hammer-forged barrel with a 1:7" twist and pistol-length gas system to reliably function with both the lightest supersonic hunting rounds and heavy, subsonic rounds.Jul 26, 2013 · The 300 BLK’s muzzle energy out of a nine inch barrel was within 100 fps of the 62 grain 5.56 coming out of a 16 inch barrel and when compared to the 62 grain 5.56 out of the 10 inch barrel, it was no contest. The 55 grain .223 bullet isn’t even in the game when compared to the performance of the 300 BLK. But when it comes to the game I think it doesn't actually change the damage that much, but it's more about the actual armor penetration you get. So, technically speaking, the more penetration you have the faster you kill your target since you get through their armor more easily. But, it's supposed to have "worse tissue damage" with higher ...Discussion. Trying to figure out if 300 Blackout is worth it vs any other AR shooting 5.56. 300 AP has 55 dmg / 44 pen vs M855A1's 45/43. A little more flesh damage doesn't seem that huge honestly. If it were actually quieter, that'd be one thing, but I'm not sure it works in game like it does in real life, because all suppressors seem to be ...The .300 Blackout allowed users to simply retrofit a .30-caliber barrel to their rifle without making any other changes, as the .300 Blackout uses a .223 case cut down to accept the .30-caliber bullet, meaning the bolt and magazine for a .223 or 5.56 firearm would work for a .300 BLK round. Therein lies the potential for misuse.The .300 Blackout bullet diameter is .308 inches, which is larger than the 6.5 Grendel's bullet diameter of .264 inches. The neck diameter of the .300 Blackout cartridge is .338 inches. Recommended powder charges for the .300 Blackout depend on the specific bullet weight and type being used, but generally range from 9 to 17 grains for subsonic ...Oct 4, 2012 ... Wanted to do some penetration tests with some of the different calibers for the AR15 Platform. 5.45x39 5.56 300 Blackout and 7.62x39.Sep 4, 2014 · The difference is in the descriptions it only lists the .223/5.56 and not the 300 Blackout. Now I understand that the 300 Blackout should work with a standard M16/AR15 Bolt Carrier Group, yet this bolt only advertises as being compatible with .223/5.56. The only difference I see between the 2 bolts is one is Nickle Boron and the other one is ... 5.56 vs .300 Blackout. Once you have decided to build an 80% lower, your next big decision is which caliber you want your new AR15 to shoot. Two commonly used options are 5.56 and .300 Blackout. 5.56 and .300 Blackout mostly use the same parts, with the exception being the barrel. The barrel is the only part that is different to …458 Socom vs 300 Blackout. The 458 Socom was designed in 2000 by Tony Rumore of Tromix Lead Delivery Systems. It is a rimless, bottlenecked cartridge that is based on the .50 Action Express case. The 458 Socom has a maximum case length of 0.990 inches and a diameter of 0.458 inches. It can shoot bullets weighing anywhere …Indeed, the cartridges represent three distinct ways of thinking: smaller, lighter, and faster for the .223/5.56 vs bigger, heavier, and slower for the .308 vs a middle of the road …Nov 9, 2016 · 300 BO is a necked up 5.56. uses the same mag's and BCG as 5.56, just swap barrels. 7.62x39, 7.62x51, 5.56 are all NATO rounds, so they are pretty common everywhere. 7.62x51 is .308 win, but at a lower case pressure than .308. you can shoot 7.62x51 in .308, but not the other way around. A power generator can be a lifesaver during a blackout. Learn if a portable or automatic standby generator is right for your home. Expert Advice On Improving Your Home Videos Lates...Originally known as the Stockholm, the 556-passenger Astoria had a famous and at times infamous career as a passenger ship that spanned more than 70 years. The credit card offers t...The most obvious difference between the 300 Blackout vs 223 Rem is the bullet diameter that each rifle cartridge fires. The 223 Remington fires a 0.224” diameter bullet while the 300 BLK uses a 0.308” diameter bullet. Both cartridges have the same overall length so they can fit in standard AR-15 mags.Nov 18, 2015 · The .300 Blackout is readily available in subsonic loads that work with suppressors, a major advantage over 7.62x39 mm-chambered arms. Shortly after SAAMI approval, the marketplace was awash with ... With bullets upward of 150/154 grains, the 7.62x39 mm’s muzzle velocities best those of the .300 Blackout by more than 200 fps at times (especially with “hotter” foreign-made loads). However ...An H3 buffer similarly should be between 5.4 and 5.5 ounces depending on the manufacturer. Finally, a Rifle buffer should weigh 5.1 to 5.3 ounces and is noticeably longer than the carbine varieties. ... H2 with a Sprinco blue spring functions beautifully in my 300 Blackout with a Faxon 9″ gunner barrel with pistol gas, a Sons of Liberty ...Southwest flights to Colorado during ski season are 30% off, but not for long. Skiers, get excited: Southwest Airlines is having a 30%-off sale on flights to Colorado Springs and D...The primary difference between 223 and 300 Blackout is the bullet diameter each rifle cartridge fires. The 223 Rem fires a 0.224” diameter bullet while the 300 ...A power generator can be a lifesaver during a blackout. Learn if a portable or automatic standby generator is right for your home. Expert Advice On Improving Your Home Videos Lates...
Though the .223 Remington cartridge below is slightly longer, both cartridges have the same SAAMI maximum overall length of 2.26″. However, the .300 Blackout has a noticeably shorter case length than the .223 Remington (1.368″ vs 1.76″). That being said, the .308 Winchester absolutely dwarfs the other two cartridges with a much longer ... . Edge aew
The most obvious difference between the 300 Blackout vs 223 Rem is the bullet diameter that each rifle cartridge fires. The 223 Remington fires a 0.224” diameter bullet while the 300 BLK uses a 0.308” diameter bullet. Both cartridges have the same overall length so they can fit in standard AR-15 mags.Jun 10, 2022 · Here's why: It's faster. At about 3,000 f/s, this round screams out of the barrel. It's lighter to carry. Whereas the 300 is a heavy .30 caliber round, the 5.56 is a .22 caliber (no it's not the same .22 caliber rim fire long rifle round in your 12-year-old plinker). So you can carry more of them. It's got a longer range of effectiveness. The AR-556® rifle with free-float handguard is now available chambered in .300 Blackout. This addition to the Ruger® AR-556 rifle line features a 16.10" cold hammer-forged barrel with a 1:7" twist and pistol-length gas system to reliably function with both the lightest supersonic hunting rounds and heavy, subsonic rounds.Gun University’s Choices of the Best 300 Blackout Magazines. Best overall. Magpul PMAG 30 AR 300 B Gen M3, 300 BLK. Purpose built for 300 BLK. Polymer body. Distinct texture from 5.56 variant. Check Price. 2. Amend2 AR-15 30-round 300 BLK Mod-3.Thus, in 350 Legend vs 300 Blackout Cartridge battle, 350 must get one extra point. Pricing. 300 BLK is more affordable compared to the 350. You can get the 300 BLK for a dollar or two per box. The reloading cost is almost the same as well, except the 350 requires a bit more gun powder. The 350 can beat 300 BLK availability wise however the 300 ...300 Blackout vs. 5.56 NATO. We recorded velocity, energy, wind drift, and bullet drop of both supersonic and subsonic 300 BLK against two of the most common 5.56 cartridges: The M855A1 (62-grain) standard ball round and MK-262 (77-grain), a popular match-grade round favored by SF operators overseas.Velocity. As illustrated in the chart, .30-06 Springfield rounds - on average - achieve a velocity of about 2820 feet per second (fps) while .300 AAC Blackout rounds travel at a velocity of 2250 fps. To put this into perspective, a Boeing 737 commercial airliner travels at a cruising speed of 600 mph, or 880 fps.Learn the history, specs, and performance of the 300 Blackout and 5.56mm NATO rounds for the AR-15 platform. Compare their ballistics, velocity, accuracy, and suitability for …STICKY - Good/Bad brass list converting 5.56->300blk. Originally compiled by tlee_20, updated with user reports. In general, the wall thickness around 1.360 inches from the base will determine success or failure. As a rule of thumb, if the wall thickness is greater than 0.014, there may be problems with the loaded diameter of the neck being too ...Thanks, Busa! While it's still probably too much noise inside, I think the .300 in a 10.5 might be at least doable as a tight area gun like the "truck/compact car trunk monkey" gun and a house gun with a linear brake. Don't even want to think of the 5.56 in that length going off between buildings, let alone in one.The difference is in the descriptions it only lists the .223/5.56 and not the 300 Blackout. Now I understand that the 300 Blackout should work with a standard M16/AR15 Bolt Carrier Group, yet this bolt only advertises as being compatible with .223/5.56. The only difference I see between the 2 bolts is one is Nickle Boron and the other one is ...AR-15 buffer weights come in a few different weights and lengths. A standard carbine buffer should weigh roughly 3 ounces. Moving up in weight, an H1 buffer weight, or Heavy Buffer, is nearly a full ounce heavier at 3.8 ounces. The H2 buffer weight should weigh roughly 4.6 to 4.7 ounces.The new CMMG Dissent is available in three calibers: 5.56 NATO, 5.7 NATO, and .300 Blackout. Both .300 BLK and 5.56 will accept and ship with their respective 30-round Magpul PMAGs, and the 5.7 ....